Apparatus for treating matters in hot liquid state



Dec. 5, 1939 A VOG-r K 2,182,664

APPARATUS FOR TREATING MATTERS IN HOT LIQUID STATE Original F'iled Oct.3l, 1935 2 Sheets-Sheet l Dec. l5, 1939. A VOGT 2,182,064

lAPPARATUS FOR TREATING MATTERS IN HOT LIQUID STATE Original Filed Oct."31, 1935 2 Sheets-Sheet 2 .Zw/enfer yay?. im ,am

Patented Dec. 1939 lAPPARATUS Adolf Vogt, Kraftborn,

FOB TREATING MATTERS 1N HOT LIQUID STATE near Breslau, Germany,

assignor to Dr. Alexander Wacker Gesellschaft fr ElektrochemischeIndustrie G. m. b. H.,

Munich, Germany, a

corporation original application october' s1, 1935, serial No.

47 ,618. Divided and this application June 9,

1937, Serial No. 147,372. In Germany November 23, 1934 2 Claims.

The present invention relates to an apparatus for removing oxidizablematters, for example carbon, from materials as, for example, iron oriron alloys. In the apparatus according to the 5 present invention,materials which contain oxidizable matters, for example, ferrochromecontaining carbon, are treated inhot liquid state with oxygen or gasescontaining oxygen at a pressure which is below atmospheric pressure.

'I'he present application is a division of my application Ser. No.47,618, iiled Oct. 31, 1935, which matured into Patent No. 2,093,666 ofSept. 21, 1937.

An object of the presentinvention resides in the provision of anapparatus for' removing carbon from matters such as iron or iron alloysin hot molten state, said apparatus comprising a container in which saidmatters are enclosed and in which the pressure is gradually reduced andin which said matters are treated with pure oxygen or a gas of highoxygen content.

A further object of the present invention is to provide an apparatus forremoving carbon from matters such as iron or iron alloys in hot moltenstate, said apparatus comprising a container in which said matters areenclosed and in which a low pressure is maintained and in which saidmatters are treated with pure oxygen or a. gas of high oxygen content.

Another object of this invention is the provision of an apparatus forremoving carbon from matters such as iron or iron alloys in hot moltensta?, said apparatus comprising a container in wh ch said matters areenclosed and in which u the pressure is reduced and in which saidmatters are treated with pure oxygen or a gas of high oxygen content,said apparatus also comprising means for controlling the level andboiling action ofthe molten matters by-controlling-v m the pressurewithin said container.

A further object ,of this invention resides in the provision of anapparatus for removing carbon from matters such as iron or iron alloysin a hot molten state, said apparatus comprising a container in whichsaid matters are enclosed and inwhich the pressure is reduced and inwhich said matters are treated with pure oxygen or a gas of high oiwgencontent, said apparatus also comprising means for controlling the leveland boiling action of said molten matters by blowing air into aparticularly-hot region of said container.

Another object of the present invention is to provide an apparatus forremoving-olddizable matters from materials in hot liquid state by (Cl.26S- 34) treating said materials with oxygen or gas of high oxygencontent and 10W pressure, said apparatus comprising a laterally open,tiltable vessel for holding the molten material, a closable and tiltablecontainer surrounding said vessel. oxygen and air supply conduitsextending into said vessel, and a suction conduit associated with saidcontainer.

A further object of the present invention is the provision of anapparatus for removing oxidizable matters from materials in hot liquidstate by treating said materials with oxygen or gas of high oxygencontent and low pressure, said apparatus comprising a tiltable,laterally. open vessel for holding the molten material, a. closable alsotiltable container surrounding said vessel', optical means adapted tooptically cooper` ate with the lateral opening in said vessel and beingadapted to project a picture of the surface of the molten materialwithin said vessel onto a surface outside of said apparatus and to makethat picture visible over large distances.

Further and other objects of the present in' vcntion will be hereinafterset forth in the accompanying specification and claims and shownV in thedrawings which, by way of illustration, show what I now consider to be apreferred emhodiment of my invention.

In the drawings:

' Fig. 1 is a diagrammatic cross sectional view of an apparatusaccording to my invention.

Fig. 2 is a diagrammatic showing of a part of the apparatus shown inFig. l and showing a modiilcation of the meansA for observing theinterior of the apparatus in operation.

Fig. 3 is a diagrammatic sectional showing of the apparatus according tothe present invention in upright position and with the cover removed.

Like parts are designated by like numerals in -all iigures of thedrawings.

In the figures: I is a container for holding the molten material andhaving an opening 3; the container is lined with a layer 2 of hightemperature resisting material. It is advisable to provide openings I2in the walls I' of con-I tainer I, which are round, slot-shaped or ofother suitable conguration and located particularly in that part ofthecontainer walls which is below the level of the surface of-the moltenmaterial. These openings permit escape of air, which may lbe containedin layer 2, through the' exterior wall of container I so that little orno air goes into the bath of molten material when evacuation of thecontainer is started. The presu is out through holes I2 and not throughthe bath when evacuation is started. Container I is located withinaclosable casing 4 which is of sumcient size to provide space all aroundcontainer I and between container I and casing 4. Conduits 5 and 6 areprovided, extending through the walls of casing or chamber 4 into theinterior of container I. One conduit serves for introducing oxygen orgases of high oxygen content, the other for introducing air or gas forcontrolling the pressure in container I and chamber Air and gases arewithdrawn from casing 4 through duct 9 which leads to pump I3 andproduces the desired low pressure within chamber 4 and container I. Avalve' I9 maybe provided in duct 9 for controlling the amount of gasremoved and the pressure within the chamber.-

Casing 4 is preferably made up of two sections 4' and 4" which aredisconnectably interconnected by means of iiange I0. The part of section4 located underneath opening 3v of container I is lined with hightemperature resisting material I I which has'the shape of a tray.Opposite the opening 3 of container I, a lens I is inserted into thewall of chamber 4, which lens projects a picture of the surface of thebath ofI molten material within container I to a surface 8 which isoutside of chamber 4 and visible to the operator, even when the latteris remote from chamber 4. Supervision of the proces is thus possible inan indirect manner which is more convenient and less dangerous. Insteadof a lens, other optical devices such as concave mirrors or the like maybe used. Such an arrangement is shown in Fig. 2. The image of the bathsurface is projected through a transpart 4, which is on the left of angeYIl) in Figs.

1 and `2, removed as is shown in Fig. 3 ofthe drawings. The horizontalposition as shown in Figs. 1 and 2 with opening-3 at the side and part 4tightly connected to part 4" is`used when carrying out the process at apressure which is'` 'below atmospheric pressure. As soonas pump I3 isstarted, a vacuum is developed in chamber 4 and container I. The gasesfor treating the molten material are introduced through conduit 5 anddirected towards the surface of the bath of molten material. If thepressure within container I becomes too low .and the molten materialfoams or rises too high, gas or air is introduced through conduit 6.Conduits 5 and 6 are provided with valves 20 and 2|, respectively, forcontrolling the amount of gas flowing therethrough. Material owing overthrough opening 3 is collected in the tray formed by lining II. Theapparatus may be cooled by spraying water on to the outside of chamber4. Pipe I4 having nozzles I5 serves for this purpose.

For introducing deoxidizing matters into container I during the process,a conduit 22 is provided having two valves 23 and 24 with a chamber 25in between. The matters are first introduced into chamber 25 with valve24 open and valve 23 closed. Then valve 24 is closed and valve'23gopened` so that the matters drop into ontainer I.

Whenthe treating process is completed, vacuum pump I3 is stoppe'd, andpart 4' of chamber 4 is removed after the'pressure inside the chamberhas reached atmospheric pressure. The molten material can then be takenout by tilting container I. y'

While I believe the above described embodiments of my invention to'bepreferred embodiments, I wish it to be understood that I do not desireto be limited to the exact details of design and construction shown anddescribed-for obviin the art.

What I claim is:

1. An apparatus for treating hot molten materials with a gas at lowpressure comprising a container having an opening and a closed casingsurrounding said container, said container having walls made ofnonporous material, said walls being lined internally with a hightemperature resisting porous lining, said walls being provided with aplurality of openings whereby the air or gas contained in the liningescapes through said openings into the outer space enclosed by saidcasing.

2. An apparatus for treating hot molten materials with gas at lowpressure comprising a container having an opening and a closed casingsurrounding said container, said container` being lined internally witha high temperature resisting material and having walls provided with .aplurality of openings in that portion which is normally below the'moltenmaterial level whereby the air -or gas contained in the portionsof saidhigh temperature resisting material covered by the, moltenmaterialescapes into the outer space enclosed by said casing;

' l ADOLF VOGT.

